diff --git a/run_onchange_before_install_main_deps.sh.tmpl b/run_onchange_before_install_main_deps.sh.tmpl
index 8609045..afeb46d 100644
--- a/run_onchange_before_install_main_deps.sh.tmpl
+++ b/run_onchange_before_install_main_deps.sh.tmpl
@@ -156,6 +156,6 @@ then
   echo
   echo
   echo "Changing shell to fish for user $USER"
-  sudo chsh -s $(which fish) $USER
+  sudo chsh -s $(command -v fish) $USER
 fi